OBJECTIVE -Offspring of diabetic mothers (ODM) are at increased risk of developing overweight and impaired glucose tolerance (IGT). Recently, we observed that early neonatal ingestion of breast milk from diabetic mothers (DBM) may dose-dependently increase the risk of overweight in childhood. Here, we investigate whether DBM intake during the late neonatal period and early infancy also influences later adipogenic and diabetogenic risk in ODM.RESEARCH DESIGN AND METHODS -A total of 112 ODM were evaluated for influence of DBM ingestion during the late neonatal period (2nd-4th neonatal week) and early infancy on relative body weight (RBW) and glucose tolerance in early childhood. RESULTS -Exclusive breast-feeding was associated with increased childhood RBW (P ϭ 0.011). Breast-fed ODM had an increased risk of overweight (odds ratio 1.98 [95% CI 1.12-3.50]). Breast-feeding duration was also positively related to childhood RBW (P ϭ 0.004) and 120-min blood glucose during an oral glucose tolerance test (P ϭ 0.022). However, adjustment for the DBM volume ingested during the early neonatal period, i.e., 1st week of life, eliminated all these relations with late neonatal breast-feeding and its duration. Interestingly, no relationship was observed between maternal blood glucose in the middle of the third trimester and the outcome.CONCLUSIONS -Neither late neonatal DBM intake nor the duration of breast-feeding has an independent influence on childhood risk of overweight or IGT in ODM. Therefore, the 1st week of life appears to be the critical window for nutritional programming in ODM by ingestion of maternal "diabetic" breast milk.
Diabetes Care 28:1457-1462, 2005B reast feeding was variously shown to protect against later overweight and diabetes (1-6). This effect is attributed to differences in the composition of formula compared with breast milk (3). Offspring of diabetic mothers (ODM) are at increased risk of developing overweight and impaired glucose tolerance (IGT) even in childhood (7-10). Underlying mechanisms are still not understood. Clinical (8 -10) and experimental (11-13) studies have shown that a diabetic intrauterine environment plays a key role in programming of increased susceptibility to overweight and diabetes.We recently observed that ingestion of breast milk from diabetic mothers (diabetic breast milk; DBM) during the 1st neonatal week may dose-dependently lead to increased rather than decreased risk of overweight in later childhood of ODM (14). This lasting deleterious effect of DBM ingestion might result from altered macronutrient and hormonal milk composition (15-18).However, as the study addressed the early neonatal nutrition, results did not show whether breast-feeding after the 1st neonatal week also has any lasting influence. The vast majority of studies on the influence of breast-feeding on later disease risk ignored whether the mother was affected by a noncommunicable, i.e., metabolic disease, during lactation and, moreover, focused only on whether breast-feeding and/or the duration of breast-f...